49531173137 has 2 divisors, whose sum is σ = 49531173138. Its totient is φ = 49531173136.

The previous prime is 49531173119. The next prime is 49531173143. The reversal of 49531173137 is 73137113594.

It is a Cunningham number, because it is equal to 222556²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49531173136 + 1 = 222556^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 49531173137 - 2¹² = 49531169041 is a prime.

It is a super-2 number, since 2×49531173137² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (49531173037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24765586568 + 24765586569.

It is an arithmetic number, because the mean of its divisors is an integer number (24765586569).

Almost surely, 2^49531173137 is an apocalyptic number.

It is an amenable number.

49531173137 is a deficient number, since it is larger than the sum of its proper divisors (1).

49531173137 is an equidigital number, since it uses as much as digits as its factorization.

49531173137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238140, while the sum is 44.

The spelling of 49531173137 in words is "forty-nine billion, five hundred thirty-one million, one hundred seventy-three thousand, one hundred thirty-seven".